Procedure #8 | Honeywell UDC2500 instruction

Troubleshooting/Service

Procedure #8

Table 7-11explains how to troubleshoot a Communications failure

Table 7-12 Troubleshooting a RS-485 Communications Failure

Step

What to do

How to do it

1	Check the Address Number,	See Section 3.13.
	ComState and Baud Rate settings.
2	Check the field wiring and	Using an ohm meter, check the resistance across
	termination resistor.	the communications rear terminals. See Section
		2.7 for wiring diagrams.

3Make sure the Communications Printed Wiring Board is installed properly in the controller.

Withdraw the chassis from the case and inspect the board. See the exploded view (Figure 8-1)for location of the board. Return the chassis to the case.

4Determine if the Communications board is faulty by running a LOCAL LOOPBACK TEST.

If the test fails, replace the board. If the test passes, the problem is most likely elsewhere in the communications network.

Disconnect the communications cable from the rear terminals. Run the Local Loopback Test.

Press [SET UP] until you see:

Upper Display

SET UP

Lower Display

COM

Press [FUNCTION] until you see:

Upper Display

DISABLE

Lower Display

LOOPBACK

Press oryou will see:

Upper Display

ENABLE

Lower Display

LOOPBACK

The test will run until the operator disables it here.

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UDC2500 Universal Digital Controller Product Manual

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Honeywell UDC2500 manual Procedure #8, Troubleshooting a RS-485 Communications Failure

Contents

UDC2500 Universal Digital Controller Product Manual WARRANTY/REMEDY Copyright 2007 by Honeywell Revision 5 April World Wide Web AbstractContacts Telephone Symbol Definitions Symbol Definition Contents Monitoring and Operating the Controller 136 177 151158 180 222 220221 226 Tables Introduction Introduction Figures Wiring Connections for Calibrating Current Output Page Function FeaturesOverview Easy to Read Displays Mount Anywhere UDC2500 Operator Interface all display items shown Function of Displays and Keys 1Function of Displays and KeysMAN Process Instrument Explorer Software Overview CE Conformity Europe Depiction of infrared communications Introduction Introduction What’s in this section? Condensed Specifications Pre-installation InformationCondensed Specifications Alarm Outputs RTU Environmental and Operating Conditions Frequency Hz Model Number Interpretation Instructions Model Number Interpretation Alarm Relay Contact Information Control and Alarm Relay Contact InformationAlarm Relays Control Relays Overall Dimensions MountingPhysical Considerations Mounting Procedure Mounting MethodStep Action Wiring Permissible Wiring Bundling Bundle No Wire Functions Wiring Diagrams Identify Your Wiring RequirementsUniversal Output Functionality and Restrictions INU Tpsc Wiring the Controller Composite Wiring Diagram Earth Ground Hot AC/DCLine Neutral Voltage L2/N Input #1 RTD Input #2 Volts Input Milliamps InputTime Simplex Solid State Relay Output 10 Open Collector Output 11 Dual Electromechanical Relay Option Output 12 Current Output Open CW 15 RS-422/485 Communications Option Connections 17 Auxiliary Output and Digital Inputs Option Connections 26 + 12 + Configuration Configuration Topics Configuration Prompt Hierarchy Configuration Prompt HierarchySet Up Group Function Prompts Configuration Procedure Configuration ProcedureProcedure Upper Display = SET Tuning Set Up Group Rate T Manrst MINRPM Gain I2 RPM ALL Configuration is CompleteI2 MIN Secur Automa DisableEnable RN HLD SP Ramp Set Up Group SP RampTI MIN Sprate FinlspSetpoint Ramp Final Setpoint Euhrup Setpoint RAMP/SOAK Program EuhrdnSpprog Strseg Hold StateDIS Pvstrt Accutune Set Up Group Tune FuzzyFuzzy Overshoot Suppression Accutune 304 Accutune Error STATUS-When an AT ERRCurrent Accutune Process 401 Algorithm Set Up GroupCtralg Onof Proportional Gain-Regulates OuthysPida Derivative Rate-Regulates Pdmr PD with Manual Reset is usedManrst in the Tuning Set Up group Three Position Step Control Timer PeriodStart Reset DispIncrmt 501 Output Set Up GroupOutalg With Control algorithm prompt Tpsc Crange OutrngCurrent Duplex Range Algorithm English Numeric Code Current Duplex Range SPLIT-This For ExampleCurrent Duplex Range Full Electromechanical RELAY-Cycle RLY TYP Relay Cycle Time IncrementMech MTR TI Input 1 Set Up Group IN1TYP601 Input 1 Actuation Type This XMITR1 Transmitter CharacterizationIN1 HI Bias IN1 LORATIO1 FILTR1 Nofs DownDownscale Burnout will force Emiss 701 Input 2 Actuation Type This Input 2 Set Up GroupIN2TYP XMITR2 RATIO2 IN2 HIIN2 LO FILTR2 Pidset Control Set Up GroupNumber of Tuning Parameter 801 SW VAL TWO Sets PV AutomaticTWO Sets SP Automatic LSP’S SP TRK Power UP Controller ModeRspsrc PWR UP Pwrout Three Position Control StepAction Failsf BandHyst Three Position Step Failsafe Failsafe Mode FsmodeMinrpm Auxiliary Output Selection Options GroupAuxout No Auxiliary Output Deviation Process Variable 0PCTAuxiliary Output LOW Scaling Auxiliary Output High Scaling DIGIN1No Digital Input Selections Manual Failsafe OUTPUT-Controller External SP Program ResetInhibit Integral RESET-Contact Keyboard LOCKOUT-Contact closure To Remote SETPOINT-Contact closure Initiate Limit Cycle TUNING-ContactSetpoint INITIALIZATION-Contact Output Tracks Input 2-Contact Plus RUN Setpoint DI1COMDigital Input 1 Combination DIGIN2 Communications Selection Communications GroupComsta Irenab Wsflt Shed Controller Mode and OutputTxdly Sdenab Units ShdspShed Setpoint Recall Percent Alarms Set Up Group Thermocouple Warning Note Deviation from LSP 2 NoteTC W TC F A1S1VA High AlarmLOW Alarm A1S1HL END of Segment A1S1EVBeginning of Segment A1S2TY A2S2TY A2S1HLA2S1EV A2S2VA ALARM1 BlockDiagal 1201 Display Set Up GroupDecmal Decimal Point LOCATION-This Lwrdsp FreqDisply Lnguag 16 P.I.E. Tool Ethernet and Email Configuration Screens Ethernet Configuration Screen Email Configuration Screen Configuration Configuration Record Sheet Option AlarmsContrl COM Monitoring and Operating the Controller Whats in this section? Operator Interface Entering a Security Code Lockout Feature Procedure to Enter a Security CodeLockout levels Key error Individual key lockout Monitoring Your Controller 4.5.1 Annunciators Annunciators Viewing the operating parameters Lower Display Key Parameter Prompts Diagnostic Messages Diagnostic Messages Functional Overview Block Diagram of the UDC2500 Controller Single Display Functionality Access the ValuesAuto-only Mode Exceptions Single Display Parameters Lower Display Prompt Upper Display Value Comments Start Up Procedure for Operation Procedure for Starting Up the ControllerUpper Display = PV Value Mode Definitions Control Mode DefinitionsControl Modes Changing Control Modes Dual Display Only What happens when you change modesSetpoints Step Operation Press Result Select Until you see 10 Procedure for Switching Between Setpoints TimerSwitching between setpoints Configuration check Viewing Times Operation Tuning indicators Accutune 11 Procedure for Starting Tune Tune for Simplex OutputsTune for Duplex Heat/Cool Using Automatic Tune at start-up for Duplex Heat/Cool Using Blended Tune at start-up for Duplex Heat/CoolConfiguration Check for Duplex Using Manual Tune at start-up for Duplex Heat/Cool 108 17 Accutune Error Codes Error Codes16 Procedure for Accessing Accutune Error Codes Aborting Accutune Fuzzy Overshoot Suppression Using Two Sets of Tuning ConstantsConfiguration Completing Accutune Upper Display = the switchover value Set up Procedure18 Set Up Procedure Upper Display = SET Lower Display = Contrl Alarm Setpoints Upper Display = SET Lower Display = AlarmsUpper Display = the PV value Lower Display = Pids X X= 1 or Display Three Position Step Control AlgorithmEstimated Motor Position Upper Display = PV = motor goes to closed position Upper Display = rangeExcept 3 Position Step 100 = motor goes to open position Setpoint Rate/Ramp/Program Overview Setting Failsafe ModeSet Failsafe Mode 23 Procedure for Setting a Failsafe Mode PV Hot Start 19Setpoint Ramp RUN/HOLD key24 Running a Setpoint Ramp Power Outage Power outages20Setpoint Rate 25 Program Contents Review program data and configurationProgram Contents Setpoint Ramp/Soak Programming Contents Definition Ramp unit Ramp/soak profile example SEG RP UnitTo Begin Program record sheet Soak Time Ramp Time Soak SP 26 Run/Monitor Functions Run/Monitor the programRun/Monitor functions Function Press Result Power outage Digital input remote switch operation Lower Display = XXHH.MMLower Display = Recxx 22 P.I.E. Tool Maintenance Screens Loop Data Loop Data Maintenance Screen Loop Data Alarm Details Alarm Details Maintenance Screen Loop Data Digital Input Details Digital Input Details Screen Status Data Maintenance Screen Status Data 10 Ethernet Status Maintenance Screen Ethernet Status Configuring your Ethernet Connection Configuring the Controller via Infrared Communications 12 Online Configuration Configuring the Controller via Ethernet Communications 14 Ethernet Communications Type Selection 15 Ethernet Communications Address 16 Configuration Upload in Progress Input Calibration Minimum and Maximum Range Values Calibration StepsSelect the Range Values W5W26 low Sensor Type PV Input Range Range Values 100 %W5W26 RP20-RP40 Disconnect the Field Wiring Preliminary InformationVoltage and Milliamp Equivalents for Input 2 Range Values Input 1 Set Up Wiring Thermocouple Inputs Using an Ice Bath 25R Thermocouple Inputs Using a Thermocouple SourceSet Up Wiring Procedure for RTD Inputs 26+ Millivolt or Volt Source 26+ To 10 Volts Set Up Wiring Procedure for 0 to 10 VoltsSet Up Wiring Procedure for Milliampere Inputs Volt Source 100K pair 26+ Input 1 Calibration Procedure 10 Input 1 Calibration Procedure Numeric CodePreliminary Steps Upper Display = Aply Lower Display = IN1SPN If … Then …Lower Display = Cjtemp 25+ Input 2 Set Up WiringTo 20 mA or 4 to 20 mA Inputs Input No connection Input 2 Calibration Procedure To 2 Volts, 0 to 5 Volts, or 1 to 5 Volt Inputs InputNo connection 26 + 13 Input 2 Calibration Procedure Numeric Code Restore Input Factory Calibration 14 Restore Factory Calibration 150 Output Calibration Calibrator Connections Set Up Wiring Procedure for Current OutputCurrent Output Calibration 19+ Current Output Calibration Procedure Numeric Code Calibrate 0 %Calibrate 100 % Set Up Wiring Procedure for Auxiliary Output Set Lock in the Tuning Set Up group to NoneAuxiliary Output Calibration Lower Display = Auxout Auxiliary Output Calibration Procedure Numeric CodeCalibration Mode Upper Display = a Value Restore Output Factory Calibration Procedure Restore Factory Calibration ProcedureUpper Display = SET Lower Display = Tuning Output Calibration Step Operation Press Result Troubleshooting/Service Troubleshooting Aids Determining the software version Procedure for Identifying the Software VersionCustomer support 32xx Power-up Tests Status Tests Background Tests Lower Reason for Failure How to Correct the Problem DisplayBackground Tests Fail Segerr CnferrPV LIM OUT1FL Other symptoms Controller Failure SymptomsSymptoms Display Output Cause Shooting Procedure Troubleshooting Procedures Procedure #2 Procedure #1Troubleshooting Power Failure Symptoms Troubleshooting Current Output Failure Refer to Installation for details Procedure #3Troubleshooting Three Position Step Control Output Failure Refer to Section Procedure #4 Troubleshooting Time Proportional Output Failure Procedure #5 Refer to Output Calibration for details Refer to Configuration for Procedure #610 Troubleshooting Alarm Relay Output Failure Refer to Installation for relay contact information Procedure #7 11 Troubleshooting a Keyboard Failure Procedure #8 12 Troubleshooting a RS-485 Communications Failure Procedure #10 Procedure #913 Troubleshooting an Ethernet Communications Failure 14 Troubleshooting Auxiliary Output Failure Restoring Factory Configuration 15 Restoring Factory ConfigurationStep What to do Software Upgrades 16 Software Upgrades 176 Exploded View UDC2500 Exploded View Parts Not Shown Software Upgrades see SectionParts Identification Key Part Number Description Removing the chassis Configuration ID Tags General InformationOther Modbus Codes Floating Point Parameter Type Register Name Access Numbers DecRegister Address Structure Integer Parameter Type Register Count Request and Response Formats Function Code 20 14h Read Configuration Reference DataDescription Byte Count Register Address Reference Type DefinitionsFile Number Register Address Format for Function Code Read Configuration Examples Example #1 Example #2 Function Code 21 15h Write Configuration Reference Data Write Restrictions Unrestricted Registers Restrictions on Parameter Numbers in One MessageRegister Format Addresses Dec Hex Write Configuration Examples General Information Non-volatile Memory Retention Reading Control Data Register Addresses Read Read Software Options StatusControl Data Parameters Option Status Miscellaneous Read Onlys Miscellaneous Read Onlys Register Addresses for Read OnlysSetPoint Program Read Only Information SetPoint Program Read Only Information Setpoint Code Selections Associated ParametersSetpoint Associated Parameters Computer Setpoint Selection Using a Computer Setpoint Overriding Controller Setpoint1 Shed Timer Reset Shed Computer Setpoint Associated Parameters Set-up Group Tuning Configuration ParametersTuning Reading or Writing Lockout 0084 132 SP Ramp/Rate/Program 10 Set-up Group Setpoint Ramp/Rate Controller Status 00B4 180 200 11 Set-up Group Accutune Algorithm 12 Set-up Group Algorithm Output Algorithms 13 Set-up Group Output Input 14 Set-up Group Input = NNM H Burnout Open 00A4 164 15 Set-up Group Input Input 00AB 171 Control 16 Set-up Group Control = RPM Options 17 Set-up Group Options SP=PV Communications 18 Set-up Group Communications Alarms 19 Set-up Group Alarms Alarm 1 Setpoint 008E 142 INT Display 20 Set-up Group Display Modbus RTU Exception Codes Function Code Field 21 Modbus RTU Data Layer Status Exception Codes QueryResponse Exception Definition Description Code Ethernet TCP/IP Further information Index UDC2500 Universal Digital Controller Product Manual 223 224 UDC2500 Universal Digital Controller Product Manual 225 Sales and Service UDC2500 Universal Digital Controller Product Manual 227 228